Formal Method of Z Specification for Basic Alcohol Level Detector

This paper demonstrates the design in specifying Z specification of basic alcohol level detector. This basic alcohol level detector determines the alcohol level of a person. Z specification, which is one of the formal methods, is applied for the software verification of this detector. The specification consists of five schemas; one state schema, one initial state schema and three operation schemas. Z/EVES is used to prove the specification. Out of three stages of proving elements, only the initial state theorem and properties proving are relevant to this basic alcohol level detector. Z specification helps in reducing the defect in the system development and prevent the ambiguous behavior in this alcohol level detector.